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Question:
Which one of the following has the lowest ionization energy?
Which one of the following has the lowest ionization energy?
Updated On: Jun 18, 2022
- $1s^2 2s^22p^6$
- $1s^22s^22p^63s^1$
- $1s^2 2s^22p^5$
- $1s^22s^22p^3$
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The Correct Option is B
Solution and Explanation
In the Periodic Table, the minimum ionisation energy is found at alkali metals. Hence sodium (electronic configuration $\left.=1 s^{2} 2 s^{2} 2 p^{6} 3 s^{1}\right)$ has the lowest ionisation energy.
Note : - Ionisation energy is the amount of energy required to remove an electron from the outermost shell an isolated atom.
Note : - Ionisation energy is the amount of energy required to remove an electron from the outermost shell an isolated atom.
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Concepts Used:
Haloalkanes and Haloarenes - Classification
Classification of Haloalkanes and Haloarenes are as follows:
Haloalkanes and Haloarenes are Classified on the Basis of the Number of Halogen Atoms:
These are further classified as mono, di, or polyhalogen (tri-,tetra-, etc.) compounds depending on whether they contain one, two or more halogen atoms in their structures. For example;
- Monohaloalkane
- Dihaloalkane
- Trihaloalkane
Haloalkanes and Haloarenes are Classified on Compounds Containing sp3 C—X Bond (X= F, Cl, Br, I)
This class includes:
- Alkyl halides or haloalkanes (R—X)
- Allylic halides
- Benzylic halides
Haloalkanes and Haloarenes are Classified on Compounds Containing sp2 C—X Bond
This class includes:
- Vinylic halides
- Aryl halides
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